液体分频介质的制备及其对光伏/热系统的影响分析
Preparation of Liquid splitting Media Andtheir Impaction on the PV/T Systems
刘炜 1郑睿 1陈文刚 1王万潮 1王刚 2林建清2
作者信息
- 1. 山东电力工程咨询院有限公司,山东济南 250100
- 2. 东北电力大学能源与动力工程学院,吉林吉林 132012
- 折叠
摘要
光谱分频光伏/热(PV/T)复合利用技术打破了PV电池低工作温度与其高品位热需求的冲突,实现了高效的光电效率和热效率.为了制备合适的选择性分频介质实现PV/T器件内能量合理分配,以去离子水为基液,利用贵金属Ag纳米颗粒与无机CoSO4组合实现分频液体光学特性的高效调控.此外,基于能量平衡法建立了典型PV/T原型系统的电、热输出模型,分析了分频介质光学调控前后对系统热电输出特性.结果表明,水基分频液具有高效红外吸收特性,加入Ag纳米颗粒后,分频介质在可见光波段出现了明显的吸收峰,峰值为 435 nm.进一步加入CoSO4后,可以拓展纳米流体吸收峰宽度,且在红外也具有一定的吸收强化.对比光学调控前后分频介质对PV/T系统热电性能影响可以看出,分频介质总的吸收特性增加,PV/T系统的热效率呈现增加的趋势,但其电效率有所下降.基于液体分频PV/T系统的总㶲效率亦随之增加,且超过 28%.分频介质光学特性高效调控可实现PV/T系统的内能量的可控分配.
Abstract
Spectral beam splitting photovoltaic/thermal(PV/T)hybrid utilization technology breaks the conflict between the low operating temperature of PV cells and their high-grade heat demand and achieves efficient photoelectric efficiency and thermal efficiency.However,the preparation of suitable selective splitting media plays a crucial role in achieving reasonable energy distribution within PV/T devices.In this study,deionized water was chosen as the base liquid,and the combination of noble metal Ag nanoparticles and inorganic CoSO4 was utilized to achieve efficient regulation of the optical properties of splitting liquids.In addition,based on the energy balance method,the electrical and thermal output models of a typical PV/T prototype system were established,and the thermal and electrical output characteristics of the system before and after the optical regulation of the splitting medium were analyzed.The results show that the water-based filter has efficient infrared absorption characteristics.After adding Ag nanoparticles,the splitting medium exhibits a clear absorption peak in the visible light band,with a peak of 435 nm.After further addition of CoSO4,the absorption peak width of the nanofluid can be expanded,and it also has certain absorption enhancement in infrared.Comparing the influence of the splitting medium on the thermal and electrical performance of the PV/T system before and after optical regulation,it can be seen that the total absorption characteristics of the splitting medium increase,and the thermal efficiency of the PV/T system shows an increasing trend,but its electrical efficiency decreases.The total exergetic efficiency of the liquid-based splitting PV/T system also increases,exceeding 28%.Efficient regulation of the optical characteristics of the splitting media can achieve a controllable allocation of internal energy in PV/T systems.
关键词
光伏/热/光谱分频/光学调控/能量平衡法Key words
photovoltaic/thermal system/spectral beam splitting/optical regulation/energy balance method引用本文复制引用
基金项目
吉林省自然科学基金学科布局项目(20210101081JC)
&&(37-K2023-102)
出版年
2024
NETL
NSTL
万方数据